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http://dx.doi.org/10.4191/KCERS.2009.46.2.137

Preparation of Ultrafine Barium Titanate Powder by Slurry Spray Pyrolysis  

Lee, Jong-Ho (LCR Division, Samsung Electro-Mechanics Co., Ltd.)
Hur, Kang-Heon (LCR Division, Samsung Electro-Mechanics Co., Ltd.)
Lee, Jung-Soo (LCR Division, Samsung Electro-Mechanics Co., Ltd.)
Publication Information
Journal of the Korean Ceramic Society / v.46, no.2, 2009 , pp. 137-145 More about this Journal
Abstract
A remarkable improvement of the productivity in barium titanate by slurry spray pyrolysis process was realized by supplying solid source slurry into the rector. The produced barium titanate powders showed uniform powder properties, and reproducibility with higher tetragonality in the range of 80$\sim$200 nm, case by case. The secondary calcination experiments of the as-prepared powders by spray pyrolysis revealed that the powders as-prepared over 700$^{\circ}C$ showed perfectly different behavior with the lower temperature's ones and the solid state reaction’s case. The result was discussed in terms of the reaction mechanism based on the activation energy analysis.
Keywords
Spray pyrolysis; Barium titanate; MLCC; Tetragonality; Reaction mechanism;
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